Error codes of ISPConfig Remote framework

Hello to everybody. I´m spanish so sorry for my bad english.
I´m using the API "remote framework" for the ispconfig. It works great but some functions returns error codes and i don´t know the meaning. Did you know if exists a file with the meaning of these codes?

for example, when i use the function to create a new website, the API returns the code 6.

best regards

 

Thanks, i saw in the database the doc_id of the web.
A question please....it´s the remote framework prepared to work with the "ISP invoices" section?

many thanks

 

Many thanks Till.